I agree with keeping the zippered front pocket, as I have found it quite useful when flying, and a couple of times, when I have flown in smaller aircraft without overhead storage, and had to hand it in at the aircraft door when boarding, I have locked the main compartment with a TSA lock that I always carry in the zippered pouch, and left the zippered pouch unlocked, with a piece of paper inside, with my name, phone number, and email address, so in the off chance that it goes missing, it has my contact details readily accessable, but is still secured.
I don't see the need for the side pockets, as I have never used them in three/four years of flying commercially with the RAID, and eliminating them, would also eliminate the need for the clips above them, thus slightly reducing cost and weight/bulk/snag points. If I carry hydration, it is a contigo mug inside the pack, although I usually carry it in the Cobra.
I definitely don't see any need for the hydration/antenna ports. Carrying a hydration bladder while flying commercially is a non starter, as you will have to empty it at each checkpoint. It will also eliminate a slight extra cost and weight/bulk/snag points. This would also eliminate the need for an internal hydration/frame pouch. I have a frame for my RAID, but when packing clothes and flying, it isn't necessary, any just adds cost, weight and bulk, and makes the pack less compressible/maleable, which can cause issues stuffing it under seats or in smaller overhead lockers.
Definitely no MOLLE anywhere. The whole reason I posted the idea for a slick pack in the first place, is because I already have a Wolf Grey RAID, and wanted something without any military features when travelling. If you want MOLLE, pouches, hydration ports, buy a RAID, they are not going to stop making it, this is just going to be a slick version.
Colour wise, wolf grey and navy blue? Definitely not MC. Possibly ranger green, coyote, black, OD, tan, but they are a little more tactical. Those colours will presumably still be available in the RAID.
Definitely add the Cobra style bungie cord system, with the ability to rapidly remove/change out the bungie.
Just my 0.02, but if you want/need all the other bits/colours, just get a regular RAID.